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Post-Tropical Cyclone Sam Public Advisory Number 51

2021-10-05 10:34:19| National Hurricane Center (Atlantic)

Issued at 900 AM GMT Tue Oct 05 2021 000 WTNT33 KNHC 050834 TCPAT3 BULLETIN Post-Tropical Cyclone Sam Advisory Number 51 NWS National Hurricane Center Miami FL AL182021 900 AM GMT Tue Oct 05 2021 ...SAM TRANSITIONS TO A POWERFUL POST-TROPICAL CYCLONE OVER THE FAR NORTH ATLANTIC BETWEEN NEWFOUNDLAND AND ICELAND... ...THIS IS THE LAST ADVISORY... SUMMARY OF 900 AM GMT...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...51.0N 39.4W ABOUT 690 MI...1110 KM ENE OF CAPE RACE NEWFOUNDLAND ABOUT 1110 MI...1785 KM SW OF REYKJAVIK ICELAND MAXIMUM SUSTAINED WINDS...80 MPH...130 KM/H PRESENT MOVEMENT...N OR 10 DEGREES AT 23 MPH...37 KM/H MINIMUM CENTRAL PRESSURE...970 MB...28.64 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 900 AM GMT (0900 UTC), the center of Post-Tropical Cyclone Sam was located near latitude 51.0 North, longitude 39.4 West. The post-tropical cyclone is moving toward the north near 23 mph (37 km/h), and this general motion should continue today with a further decrease in forward speed. A slow east-northeastward motion is forecast to begin by late today, and a northeastward motion is expected Wednesday and Wednesday night. Maximum sustained winds have decreased to near 80 mph (130 km/h) with higher gusts. Although gradual weakening is forecast during the next few days, Sam is expected to remain a powerful post-tropical cyclone over the north Atlantic today. Hurricane-force winds extend outward up to 80 miles (130 km) from the center and gale-force winds extend outward up to 460 miles (740 km). The estimated minimum central pressure is 970 mb (28.64 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Sam can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC, and on the web at hurricanes.gov/graphics_at3.shtml?key_messages. SURF: Swells generated by Sam will impact the northern Leeward Islands, the Greater Antilles, portions of the Bahamas, and southeastern Newfoundland through midweek. These swells could cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- This is the last public advisory issued by the National Hurricane Center on Sam. Additional information on this system can be found in High Seas Forecasts issued by the National Weather Service, under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and online at ocean.weather.gov/shtml/NFDHSFAT1.php. $$ Forecaster Stewart

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Post-Tropical Cyclone Sam Forecast Advisory Number 51

2021-10-05 10:32:49| National Hurricane Center (Atlantic)

Issued at 0900 UTC TUE OCT 05 2021 000 WTNT23 KNHC 050832 TCMAT3 POST-TROPICAL CYCLONE SAM FORECAST/ADVISORY NUMBER 51 NWS NATIONAL HURRICANE CENTER MIAMI FL AL182021 0900 UTC TUE OCT 05 2021 THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. POST-TROPICAL CYCLONE CENTER LOCATED NEAR 51.0N 39.4W AT 05/0900Z POSITION ACCURATE WITHIN 25 NM PRESENT MOVEMENT TOWARD THE NORTH OR 10 DEGREES AT 20 KT ESTIMATED MINIMUM CENTRAL PRESSURE 970 MB MAX SUSTAINED WINDS 70 KT WITH GUSTS TO 85 KT. 64 KT....... 0NE 70SE 70SW 0NW. 50 KT.......120NE 150SE 150SW 60NW. 34 KT.......240NE 270SE 400SW 300NW. 12 FT SEAS..240NE 420SE 780SW 390NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 51.0N 39.4W AT 05/0900Z AT 05/0600Z CENTER WAS LOCATED NEAR 50.0N 39.5W FORECAST VALID 05/1800Z 52.1N 38.9W...POST-TROP/EXTRATROP MAX WIND 65 KT...GUSTS 80 KT. 64 KT... 60NE 60SE 50SW 0NW. 50 KT...100NE 110SE 110SW 100NW. 34 KT...300NE 340SE 480SW 330NW. FORECAST VALID 06/0600Z 52.8N 35.1W...POST-TROP/EXTRATROP MAX WIND 60 KT...GUSTS 75 KT. 50 KT...110NE 150SE 150SW 70NW. 34 KT...300NE 450SE 480SW 300NW. FORECAST VALID 06/1800Z 54.3N 30.0W...POST-TROP/EXTRATROP MAX WIND 55 KT...GUSTS 65 KT. 50 KT... 0NE 100SE 100SW 0NW. 34 KT...240NE 300SE 270SW 180NW. FORECAST VALID 07/0600Z 57.9N 24.6W...POST-TROP/EXTRATROP MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 0NE 0SE 90SW 50NW. 34 KT...200NE 230SE 190SW 150NW. FORECAST VALID 07/1800Z 61.8N 23.9W...POST-TROP/EXTRATROP MAX WIND 45 KT...GUSTS 55 KT. 34 KT...400NE 280SE 270SW 420NW. FORECAST VALID 08/0600Z 62.7N 27.4W...POST-TROP/EXTRATROP MAX WIND 45 KT...GUSTS 55 KT. 34 KT...330NE 280SE 390SW 420NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 09/0600Z 61.7N 26.2W...POST-TROP/EXTRATROP MAX WIND 40 KT...GUSTS 50 KT. OUTLOOK VALID 10/0600Z 63.6N 15.0W...POST-TROP/EXTRATROP MAX WIND 40 KT...GUSTS 50 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 51.0N 39.4W THIS IS THE LAST FORECAST/ADVISORY ISSUED BY THE NATIONAL HURRICANE CENTER ON SAM. ADDITIONAL INFORMATION ON THIS SYSTEM CAN BE FOUND IN HIGH SEAS FORECASTS ISSUED BY THE NATIONAL WEATHER SERVICE... UNDER AWIPS HEADER NFDHSFAT1 AND WMO HEADER FZNT01 KWBC. $$ FORECASTER STEWART

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Hurricane Sam Public Advisory Number 49

2021-10-04 22:30:41| National Hurricane Center (Atlantic)

Issued at 900 PM GMT Mon Oct 04 2021 000 WTNT33 KNHC 042030 TCPAT3 BULLETIN Hurricane Sam Advisory Number 49 NWS National Hurricane Center Miami FL AL182021 900 PM GMT Mon Oct 04 2021 ...SAM RACING NORTHEASTWARD OVER THE NORTH ATLANTIC... ...EXPECTED TO TRANSITION INTO A POWERFUL POST-TROPICAL CYCLONE TONIGHT... SUMMARY OF 900 PM GMT...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...45.1N 42.5W ABOUT 520 MI...840 KM E OF CAPE RACE NEWFOUNDLAND MAXIMUM SUSTAINED WINDS...90 MPH...150 KM/H PRESENT MOVEMENT...NE OR 35 DEGREES AT 36 MPH...57 KM/H MINIMUM CENTRAL PRESSURE...965 MB...28.50 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 900 PM GMT (2100 UTC), the center of Hurricane Sam was located near latitude 45.1 North, longitude 42.5 West. Sam is moving toward the northeast near 36 mph (57 km/h). This general motion should continue tonight. A slower east-northeastward motion is forecast to begin by late Tuesday, and a northeastward motion is expected Wednesday and Wednesday night. Maximum sustained winds are near 90 mph (150 km/h) with higher gusts. Although gradual weakening is forecast during the next few days, Sam is expected to transition into a powerful post-tropical cyclone over the north Atlantic tonight. Hurricane-force winds extend outward up to 80 miles (130 km) from the center and tropical-storm-force winds extend outward up to 275 miles (445 km). The estimated minimum central pressure is 965 mb (28.50 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Sam can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC, and on the web at hurricanes.gov/graphics_at3.shtml?key_messages. SURF: Swells generated by Sam will impact the northern Leeward Islands, the Greater Antilles, portions of the Bahamas, and southeastern Newfoundland through early Tuesday. These swells could cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 300 AM GMT. $$ Forecaster Brown

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Remnants of Victor Public Advisory Number 21

2021-10-04 16:42:57| National Hurricane Center (Atlantic)

Issued at 1100 AM AST Mon Oct 04 2021 000 WTNT35 KNHC 041442 TCPAT5 BULLETIN Remnants Of Victor Advisory Number 21 NWS National Hurricane Center Miami FL AL202021 1100 AM AST Mon Oct 04 2021 ...VICTOR DEGENERATES INTO A TROUGH OVER THE CENTRAL ATLANTIC... ...THIS IS THE FINAL NHC ADVISORY... SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...18.8N 45.2W ABOUT 1410 MI...2270 KM W OF THE CABO VERDE ISLANDS MAXIMUM SUSTAINED WINDS...30 MPH...45 KM/H PRESENT MOVEMENT...WNW OR 300 DEGREES AT 15 MPH...24 KM/H MINIMUM CENTRAL PRESSURE...1011 MB...29.86 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 1100 AM AST (1500 UTC), the remnants of Victor were located near latitude 18.8 North, longitude 45.2 West. The remnants are moving toward the west-northwest near 15 mph (24 km/h), and this general motion is expected to continue through tonight. Recent satellite-derived wind data indicate that maximum sustained winds are near 30 mph (45 km/h) with higher gusts. Weakening is forecast through tonight. The estimated minimum central pressure is 1011 mb (29.86 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- This is the last public advisory issued by the National Hurricane Center on Victor. Additional information on the remnants of Victor can be found in High Seas Forecasts issued by the National Weather Service, under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and online at ocean.weather.gov/shtml/NFDHSFAT1.php $$ Forecaster Reinhart

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Hurricane Sam Public Advisory Number 48

2021-10-04 16:42:36| National Hurricane Center (Atlantic)

Issued at 1100 AM AST Mon Oct 04 2021 000 WTNT33 KNHC 041442 TCPAT3 BULLETIN Hurricane Sam Advisory Number 48 NWS National Hurricane Center Miami FL AL182021 1100 AM AST Mon Oct 04 2021 ...SAM MOVING QUICKLY NORTHEASTWARD... ...FORECAST TO BECOME A POWERFUL POST-TROPICAL CYCLONE TONIGHT OR EARLY TUESDAY... SUMMARY OF 1100 AM AST...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...42.6N 45.7W ABOUT 460 MI...740 KM SE OF CAPE RACE NEWFOUNDLAND MAXIMUM SUSTAINED WINDS...100 MPH...155 KM/H PRESENT MOVEMENT...NE OR 45 DEGREES AT 32 MPH...52 KM/H MINIMUM CENTRAL PRESSURE...960 MB...28.35 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 1100 AM AST (1500 UTC), the center of Hurricane Sam was located near latitude 42.6 North, longitude 45.7 West. Sam is moving toward the northeast near 32 mph (52 km/h). A faster northeastward motion is expected through tonight. A slower east-northeastward motion is forecast to begin on Tuesday and continue through midweek. Maximum sustained winds are near 100 mph (155 km/h) with higher gusts. Gradual weakening is forecast during the next few days, and Sam is expected to transition into a powerful post-tropical cyclone over the north Atlantic tonight or early Tuesday. Hurricane-force winds extend outward up to 60 miles (95 km) from the center and tropical-storm-force winds extend outward up to 275 miles (445 km). The estimated minimum central pressure is 960 mb (28.35 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Sam can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC, and on the web at hurricanes.gov/graphics_at3.shtml?key_messages. SURF: Swells generated by Sam will impact the northern Leeward Islands, the Greater Antilles, portions of the Bahamas, and southeastern Newfoundland for the next day or so. These swells could cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 500 PM AST. $$ Forecaster Brown

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